#pragma once

#include <iostream>
#include <time.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
using namespace std;
#define SIZE 1024

#define Info 0
#define Debug 1
#define Warning 2
#define Error 3
#define Fatal 4

#define Screen 1
#define Onefile 2
#define Classfile 3

#define LogFile "log.txt"

class Log{
    public:
    Log(){
        printMethod=Screen;
        path="./log/";
    }
    void Enable(int method)
    {
        printMethod=method;
    }
    string levelToString(int level)
    {
        switch (level)
        {
            case Info:
            return "Info";
            case Debug:
            return "Debug";
            case Warning:
            return "Warning";
            case Error:
            return "Error";
            case Fatal:
            return "Fatal";
            default:
            return "None";
        }
    }

    void printLog(int level,const string& logtxt)
    {
        switch(printMethod)
        {
            case Screen:
            cout<<logtxt<<endl;
            break;
            case Onefile:
            printOneFile(LogFile,logtxt);
            break;
            case Classfile:
            printClassFile(level,logtxt);   
            break;
            default:
            break;
        }
    }
    void printOneFile(const string &logname,const string&logtxt)
    {
        string _logname=path+logname;
        int fd=open(_logname.c_str(),O_WRONLY|O_CREAT|O_APPEND,0666);
        if(fd<0) return;
        write(fd,logtxt.c_str(),logtxt.size());
        close(fd);
    }
    void printClassFile(int level, const string&logtxt)
    {
        string filename=LogFile;
        filename=".";
        filename+=levelToString(level);
        printOneFile(filename,logtxt);
    }
    ~Log()
    {
    }
    void operator()(int level,const char*format,...)
    {
        time_t t=time(nullptr);
        struct tm*ctime=localtime(&t);
        char leftbuffer[SIZE];
        snprintf(leftbuffer,sizeof(leftbuffer),"[%s][%d-%d-%d %d:%d:%d]",levelToString(level).c_str(),
        ctime->tm_year+1900,ctime->tm_mon+1,ctime->tm_mday,
        ctime->tm_hour,ctime->tm_min,ctime->tm_sec);
        va_list s;
        va_start(s,format);
        char rightbuffer[SIZE];
        vsnprintf(rightbuffer, sizeof(rightbuffer), format, s);
        va_end(s);
        char logtxt[SIZE*2];
        snprintf(logtxt,sizeof(logtxt),"%s %s",leftbuffer,rightbuffer);
        printLog(level,logtxt);
    }
    private:
    int printMethod;
    string path;

};